WARNING: CPU: 0 PID: 17737 at fs/overlayfs/dir.c:263 ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 17737 Comm: syz-executor2 Not tainted 4.20.0-rc1-next-20181109+ #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Code: c3 89 c6 e8 69 84 ee fe 85 db 0f 85 9e 00 00 00 e8 4c 83 ee fe 4c 89 e7 45 31 f6 e8 11 18 45 ff e9 ec fe ff ff e8 37 83 ee fe <0f> 0b e9 e0 fe ff ff e8 2b 83 ee fe 0f 0b e9 63 ff ff ff e8 1f db
RSP: 0018:ffff8801bf187990 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff8801bf187a28 RCX: ffffc90012cb2000
RDX: 0000000000011f29 RSI: ffffffff82912579 RDI: 0000000000000007
RBP: ffff8801bf187a50 R08: ffff88017ff6e480 R09: ffffed0037e30ee5
R10: ffffed0037e30ee5 R11: 0000000000000003 R12: ffff8801c00cb580
R13: ffff8801bf1879c8 R14: ffffffffffffff8c R15: 0000000000000000
 ovl_create_over_whiteout fs/overlayfs/dir.c:518 [inline]
 ovl_create_or_link+0xad6/0x1560 fs/overlayfs/dir.c:582
 ovl_create_object+0x2e9/0x3a0 fs/overlayfs/dir.c:616
 ovl_create+0x2b/0x30 fs/overlayfs/dir.c:630
 vfs_create+0x388/0x5b0 fs/namei.c:2912
 do_mknodat+0x410/0x530 fs/namei.c:3766
 __do_sys_mknod fs/namei.c:3795 [inline]
 __se_sys_mknod fs/namei.c:3793 [inline]
 __x64_sys_mknod+0x7b/0xb0 fs/namei.c:3793
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
kobject: 'loop3' (000000009dceb1db): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
kobject: 'loop3' (000000009dceb1db): fill_kobj_path: path = '/devices/virtual/block/loop3'
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f820be8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000340
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f820be8e6d4
R13: 00000000004c2b2e R14: 00000000004d4798 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..